Rolling machine of the bridge type for the treatment of leather



March 27, 1951 J. KADLECIK 2,546,544

ROLLING MACHINE OF THE BRIDGE TYPE FOR THE TREATMENT OF LEATHER Filed Oct. 18, 1949 2 Sheets-Sheet 1 March 27, 1951 J. KADLECIK ROLLING MACHINE OF THE BRIDGE TYPE FOR THE TREATMENT OF LEATHER 2 Sheets-Sheet 2 Filed Oct 18, 1949 INVENTOR: BY. 2 1

Patented Mar. 27, 1951 U I i UNITED :STATES PATENT o t-rice ROLLING MACHINE OF THE BRIDGE FOR THE TREATMENT OF LE ATHER Josef ,Kadleik, Spytihnev, Czechoslovakiaas j sig nor to; Svit, narodni podnik, Gottwaldov a Czechoslovakia v Application October 18, 1949, Serial No. 122,008

In Czechoslovakia October 30, 1948' i i J ...1i. 1 -C1 ie e-"w The present invention relates to improvements 7 dufihg Which the S i exerts pressure aga hs t in rolling machines of the bridge type used for the Contact element I ironing or rolling leather, and more particularly However, all the p o d s sve a Common to an arrangement which provides for an easy disadvantage n that t y are relatively c control both of the reversal of the working roll 5 eated d f r th s r as qu careful mainand of the length of the rolling stroke of the tenaneeand relatively qu t r pa latter. This disadvantage is completely avoided to For the treatment of leather, especially of Present invention which resides in that sole leather in theshoe manufacture, rolling shlftlhg rod has x thereon Step-like Stops machines are employed in which the leather is 10 which groupefi intjo two helices arranged. ironed or ironed by means of heavy 1.011 to in opposite relat1onsh1p to each other with which a reciprocating movement is imparted. respect to the centermintPf the For a better understandmg of the essence-of The-reversal in the travel of the roll is eiiected t by means of a shifting rod which at a suitable h present lpventlon c-qn-struptmnal example moment shifts, for instance, a belt of the machine W111 be descnbtad herelrtafter. reference to drive. The shifting rod is actuated inthe g i i drawfilgs. i 1 majority of constructions automatically by the i t ta t 2 It roll slide abutting against stops fastened on the ig g mac ne acqqr e tmqn? shifting rod. The distance between the end posir tions of the roll is determined by adjustment gfisggj j sf f t trmgement of the x of the Stops; u Figure 3 is a detail view showing the shifting. the of rqllmg machmesi shlftmg rod with the helically arranged stops on the" devices of various designs have been proposed same. and v v for reversing the travel of the roll in accordance Figure4, is a diagrammatic View f the hiftwith the actual length of the leather piece under m device together with t d t d con." treatment. In one of the prior designs the slide trol roch is provided with a clamping device which upon In the machine-r shown in the drawings th the depression of a pedal seizes the shiftingrod Overhead beam 3 has suspended on th e at the appropriate m0ment and mOVeS the latter between the two stays I and the reinforcing bolts so as to reverse the direction of movement of 2 a Slide 4 which is t d t b v d t nd the roll. According to another prior construcfr together with the-working 11 5 h lide tion the driving spindle of the ,slide drives also 4 i d i en by a-- screw threaded spindle -6 to a Pulley, which by means of a loosely running which is imparted from a motor -1 through the belt is Connected to a Second pulley provided intermediary of a bottom counter 'shaft8 ends w a toot ed e adapted t0 mesh With a top countershaft 9, a straight belt H]; a crossed r k f rm on th shif in r By p s in belt I l and the wedge-shaped belts l2. The two a p da at the appropriatemoment the belt is belts I U and l I run round loose pulleys l3 and tensiened thereby a in h hiftin vi 14 while the intermediate pulley l 5 is fast on the Both these arrangements show certain dis- 4 shaft 9 and by means of the wedge-shaped belts advantages which reside primarily in that the I2 is connected to the driving spindle 6. The shifting devices require the constant attention movement and direction of rotation of the pulley an attendant and for f y roun they l5 which is fast on its shaft are determined in require also the use of automatic end stops which each case by the position of the belt fork I 6, cause the shifting to be efiected automatically shifting link l1, lever l8 and shifting rod IS. in the extreme positions of the roll. The handling In accordance with the present invention, fixed of thej machines of this type is very fatiguing stops 20 are provided on the shifting rod [9. forftlie attendant because at each reversal of Figure 3 shows that the stops 20 are arranged the travel of the roll he must depress the pedal along two opposed helices, as viewed from the and, in addition, tenSiOn the Clamping device center point of the shifting rod IS, the developed or shift the belts by muscular force. shape of the two helices being shown in Figure 2. Further on stops have been proposed having The stops 20 form an integral unit with the contact elements which under the pressure of shifting rod IS. The slide t carries two spring the oncoming slide cause the stops to be urged contact elements 2| which upon en ageflxedly connected to the shiftin rod tor the time ment with the positioned stops '20 produce longitudinal movement of the shifting rod l9 and thereby reversal of the operation of the machine.

The shifting rod I9 is mounted in bearings 22, Figure 4, at the rear of the machine and through the intermediary of a chain transmission from the working station.

lows

In accordance with the length of the leather piece to be rolled, the attendant first adjusts the operating stroke of the roll 5 by turning the control rod 25, Figure 5, about its longitudinal axis whereby the corresponding .pairofstops 20- is positioned opposite to the contact elements, 2| u The stops are grouped on both sides of the. center point of the shifting rod into two helices "in such a way that the two corresponding opposite stops nearest to each other serve to limit the shortest working stroke of the roll, while the two stops which are most remote from each other serve to limit the largest working stroke of the roll (Figure 2). Depending on the number of of stops in the helices, a finer or a rougher adjustment of the stroke-of the working roll is obtained, the stroke being determined by the surfacearea of the leather piece 'to be rolled. The working roll which travels over the leather will engage by-means of the contact elements 2|, Figure 1, with a positioned stop 20 and will displace the shifting rod l9 as a whole in the. direction of its The apparatus above described operates as folj The'apparatus according to the present invention provides a simple, readily performable and very reliable method for controlling the movement of the working roll.

What I claim is:

1. In a rolling machine of the bridge type having a reciprocating working roll the direction of movement of which is changed by means of a shifting rod provided with stops which limit the working path of the roll, the arrangement on the shifting rod of fixed stops which are disposed along two opposed helices as viewed from the center point of the said rod.

2. In a rolling machine of the bridge type having a reciprocating working roll the direction of movement of which is changed by means of a of its preceding rotation and the slide withthe working roll is caused to travel towards the opposite stop. Should the attendant wish to alter the size of the working stroke of the roll 5' d'uring the operation of the machine, he only must turn the hand operated rod 25 so as to position on the shifting rod, which is connected by means of the chain transmission 24 with the hand operated rod, the corresponding pair of stops and of the working roll.

shifting rod provided with stops which limit the working path of the roll, the arrangement on the shifting rod of fixed stops which are disposed along two opposed helices as viewed from the center point of the said rod, and a control rod for controlling'the'rotational movements of the shifting rod. v 3. In a rolling machine of the bridge typ having'a reciprocating working roll the direction of movement of which is changed by means of a shifting rod provided with stops which limit the working path of the roll, the arrangement on the shifting rod of fixed stops which are disposed along two opposed helices as viewed from the center point of the said rod, and .a control rod for-controlling the rotational movements of-the shifting rod, the control rod and the shifting rod being arranged parallel to each-other.-

- 4. In a rolling machine of the bridge type having a reciprocating working roll the direction of movement of which is changed by means of a shifting rod provided with stops which limit the -working path of. the roll, the arrangement on the shiftingrod of fixed stops which are disposed along two opposed helices as viewed from the center point of the said rod, and a control rod connected to the shifting rod by means of a chain transmission.

JosEFKADLEI'K.

No references cited. 

